不用于防龋的蔗糖代用品是()
A.山梨醇
B.木糖醇
C.甜菊糖
D.果糖
E.甘露醇
参考答案:D
—Hello ! May I speak to Mr. Smich?
— .I'll go and get him. [ ]
A. Speaking
B. Hurry up,please
C. Wrong number
D. Hold on,please
学习疲劳的辅导有哪些方面?